PatchSiren cyber security CVE debrief

CVE-2026-45173 CyberArk Software, a Palo Alto Networks Company CVE debrief

CVE-2026-45173 is a HIGH severity vulnerability in Idiria Identity Browser Extension versions prior to 26.8.1. The vulnerability exhibits an origin validation flaw within its internal web-page verification routines. If an authenticated user navigates to a specially crafted webpage, this interaction could potentially allow a remote attacker to trigger unauthorized application interaction or execution parameters within the context of that authenticated browser session.

Vendor: CyberArk Software, a Palo Alto Networks Company
Product: Identity Browser Extensions
CVSS: HIGH 8.4
CISA KEV: Not listed in stored evidence
Original CVE published: 2026-06-11
Original CVE updated: 2026-06-22
Advisory published: 2026-06-11
Advisory updated: 2026-06-22

Who should care

Users of Idiria Identity Browser Extension (Chrome, Firefox, and Edge builds) versions prior to 26.8.1 should update to the latest version to mitigate this vulnerability.

Technical summary

The vulnerability has a CVSS score of 8.4 and is classified as HIGH severity. The CVSS vector is CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:L/VA:N/SC:H/SI:H/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:Amber.

Defensive priority

HIGH

Recommended defensive actions

Update Idiria Identity Browser Extension to version 26.8.1 or later.
Be cautious when navigating to untrusted webpages, especially when authenticated.

Evidence notes

The vulnerability is described in CyberArk Security Bulletin: CA26-21.

Sources and references

Verified primary and authoritative sources

CVE-2026-45173 CVE Program record
Publisher, destination, and source semantics verified

URL: https://www.cve.org/CVERecord?id=CVE-2026-45173

CVE Program - Official CVE Program record with source-provided CVE metadata.
CVE-2026-45173 NVD vulnerability detail
Publisher, destination, and source semantics verified

URL: https://nvd.nist.gov/vuln/detail/CVE-2026-45173

NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Source reference
Unverified legacy reference

URL: https://docs.cyberark.com/find-identity-administration-docs/latest/en/content/getstarted/identity-new-doc-location.htm

[email protected]

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.